diff options
Diffstat (limited to 'attic/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.C')
| -rw-r--r-- | attic/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.C | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/attic/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.C b/attic/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.C deleted file mode 100644 index a0194022..00000000 --- a/attic/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.C +++ /dev/null @@ -1,165 +0,0 @@ -/* - ZynAddSubFX - a software synthesizer - - Envelope.C - Envelope implementation - Copyright (C) 2002-2005 Nasca Octavian Paul - Author: Nasca Octavian Paul - - This program is free software; you can redistribute it and/or modify - it under the terms of version 2 of the GNU General Public License - as published by the Free Software Foundation. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License (version 2) for more details. - - You should have received a copy of the GNU General Public License (version 2) - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -*/ - -#include <stdio.h> -#include "Envelope.h" - -Envelope::Envelope(EnvelopeParams *envpars,REALTYPE basefreq){ - int i; - envpoints=envpars->Penvpoints; - if (envpoints>MAX_ENVELOPE_POINTS) envpoints=MAX_ENVELOPE_POINTS; - envsustain=(envpars->Penvsustain==0)?-1:envpars->Penvsustain; - forcedrelase=envpars->Pforcedrelease; - envstretch=pow(440.0/basefreq,envpars->Penvstretch/64.0); - linearenvelope=envpars->Plinearenvelope; - - if (envpars->Pfreemode==0) envpars->converttofree(); - - REALTYPE bufferdt=SOUND_BUFFER_SIZE/(REALTYPE)SAMPLE_RATE; - - int mode=envpars->Envmode; - - //for amplitude envelopes - if ((mode==1)&&(linearenvelope==0)) mode=2;//change to log envelope - if ((mode==2)&&(linearenvelope!=0)) mode=1;//change to linear - - for (i=0;i<MAX_ENVELOPE_POINTS;i++) { - REALTYPE tmp=envpars->getdt(i)/1000.0*envstretch; - if (tmp>bufferdt) envdt[i]=bufferdt/tmp; - else envdt[i]=2.0;//any value larger than 1 - - switch (mode){ - case 2:envval[i]=(1.0-envpars->Penvval[i]/127.0)*MIN_ENVELOPE_DB; - break; - case 3:envval[i]=(pow(2,6.0*fabs(envpars->Penvval[i]-64.0)/64.0)-1.0)*100.0; - if (envpars->Penvval[i]<64) envval[i]=-envval[i]; - break; - case 4:envval[i]=(envpars->Penvval[i]-64.0)/64.0*6.0;//6 octaves (filtru) - break; - case 5:envval[i]=(envpars->Penvval[i]-64.0)/64.0*10; - break; - default:envval[i]=envpars->Penvval[i]/127.0; - }; - - }; - - envdt[0]=1.0; - - currentpoint=1;//the envelope starts from 1 - keyreleased=0; - t=0.0; - envfinish=0; - inct=envdt[1]; - envoutval=0.0; -}; - -Envelope::~Envelope(){ -}; - - -/* - * Relase the key (note envelope) - */ -void Envelope::relasekey(){ - if (keyreleased==1) return; - keyreleased=1; - if (forcedrelase!=0) t=0.0; -}; - -/* - * Envelope Output - */ -REALTYPE Envelope::envout(){ - REALTYPE out; - - if (envfinish!=0) {//if the envelope is finished - envoutval=envval[envpoints-1]; - return(envoutval); - }; - if ((currentpoint==envsustain+1)&&(keyreleased==0)) {//if it is sustaining now - envoutval=envval[envsustain]; - return(envoutval); - }; - - if ((keyreleased!=0) && (forcedrelase!=0)){//do the forced release - - int tmp=(envsustain<0) ? (envpoints-1):(envsustain+1);//if there is no sustain point, use the last point for release - - if (envdt[tmp]<0.00000001) out=envval[tmp]; - else out=envoutval+(envval[tmp]-envoutval)*t; - t+=envdt[tmp]*envstretch; - - if (t>=1.0) { - currentpoint=envsustain+2; - forcedrelase=0; - t=0.0; - inct=envdt[currentpoint]; - if ((currentpoint>=envpoints)||(envsustain<0)) envfinish=1; - }; - return(out); - }; - if (inct>=1.0) out=envval[currentpoint]; - else out=envval[currentpoint-1]+(envval[currentpoint]-envval[currentpoint-1])*t; - - t+=inct; - if (t>=1.0){ - if (currentpoint>=envpoints-1) envfinish=1; - else currentpoint++; - t=0.0; - inct=envdt[currentpoint]; - }; - - envoutval=out; - return (out); -}; - -/* - * Envelope Output (dB) - */ -REALTYPE Envelope::envout_dB(){ - REALTYPE out; - if (linearenvelope!=0) return (envout()); - - if ((currentpoint==1)&&((keyreleased==0)||(forcedrelase==0))) {//first point is always lineary interpolated - REALTYPE v1=dB2rap(envval[0]); - REALTYPE v2=dB2rap(envval[1]); - out=v1+(v2-v1)*t; - - t+=inct; - if (t>=1.0) { - t=0.0; - inct=envdt[2]; - currentpoint++; - out=v2; - }; - - if (out>0.001) envoutval=rap2dB(out); - else envoutval=-40.0; - } else out=dB2rap(envout()); - - return(out); -}; - -int Envelope::finished(){ - return(envfinish); -}; - |